A stratovolcano, also known as a composite volcano, is a conical volcano built up by many layers (strata) of hardened lava, tephra, pumice, and volcanic ash.nlike shield volcanoes, stratovolcanoes are characterized by a steep profile and periodic explosive eruptions and effusive eruptions, although some have collapsed craters called calderas. The lava flowing from stratovolcanoes typically cools and hardens before spreading far due to high viscosity.
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The primary sensing device 10 is depicted in FIG. 5 as installed, e.g., with a fluid carrying conduit within which the rate of flow of a fluid is to be measured and, due to the energy transmitted by the moving fluid to the tensioned reed 12, a harmonic wave pattern is set up within the reed 12.